BACKGROUND: An estimated 2.2 million people from Central and Eastern Europe (CEE) live in the United Kingdom. It has been documented that CEE migrants underutilise health services in the United Kingdom and, as an alternative, seek healthcare in their home country. However, reasons for seeking healthcare abroad are not always clear. This review aims to identify the reasons for the uptake of transnational healthcare among CEE migrants resident in the United Kingdom. METHODS: Informed by discussions with community members, medical stakeholders and academics, a systematic scoping review was undertaken following the nine-stage Joanna Briggs Institute framework for scoping reviews. A search strategy with MeSH terms, where relevant, was used and adapted in five academic databases, two grey literature databases and Google Scholar. Included records encompassed four concepts: migration, CEE nationalities, UK nations and healthcare utilisation, which were written in English and published between May 2004 and 2022. Data from the literature were coded, grouped and organised into themes. RESULTS: A total of 16 publications fulfilled the inclusion criteria. There is evidence that some CEE migrants exclusively use healthcare services in the United Kingdom. However, many CEE migrants utilise healthcare both in the United Kingdom and their country of origin. Four themes were identified from the literature as to why migrants travelled to their country of origin for healthcare: cultural expectations of medical services, distrust in the UK NHS, barriers and transnational ties. CONCLUSION: Push factors led CEE migrants to seek healthcare in their country of origin, facilitated by ongoing transnational ties. CEE migrants frequently combine visits to their country of origin with medical appointments. Utilising healthcare in their country of origin as opposed to the United Kingdom can result in fragmented and incomplete records of medications, medical tests and surgeries and risk of unnecessary treatments and complications. This review highlights the need for more targeted health outreach with CEE groups within the United Kingdom, as well as the need for further research on the impact of national events, for example, COVID-19 and Brexit, on transnational healthcare-seeking behaviours. PATIENT OR PUBLIC CONTRIBUTION: The concept for this scoping review was informed by discussions with community members, medical professionals and academics, who identified it as a current issue. The results of this scoping review were discussed with healthcare stakeholders.